/* diceroll.c -- dice role simulation */
/* compile with mandydice.c */
#include "diceroll.h"

#include <stdio.h>
#include <stdlib.h> /* for library rand() */

int roll_count = 0; /* external linkage */

static int rollem(int sides) { /* private to this file */
  int roll;

  roll = rand() % sides + 1;
  ++roll_count; /* count funtion calls */

  return roll;
}

int roll_n_dice(int dice, int sides) {
  int d;
  int total = 0;
  if (sides < 2) {
    printf("Need at least 2 sides.\n");
    return -2;
  }

  if (dice < 1) {
    printf("Need at least 1 die.\n");
    return -1;
  }

  for (d = 0; d < dice; d++) {
    total += rollem(sides);
  }

  return total;
}
